I recently purchased a handheld battery-operated GPS chartplotter. I was told it could survive 30 minutes in a couple of feet of seawater. But once when landing the dinghy on a beach, I jumped out too soon with the GPS in my pocket.
As much as I value LED lighting, I was hesitant to change Gizmo’s navigation light fixtures. Why spend the (significant) money and refit time to save power when a big alternator is always running at the same time as the running lights anyway?